Description

The A4988 driver Stepper Motor Driver is a complete micro-stepping motor driver with a built-in converter, easy to operate. It operates from 8 V to 35 V and can deliver up to approximately 1 A per phase without a heat sink or forced air flow (it is rated for 2 A per coil with sufficient additional cooling).

A4988 driver Stepper Motor Driver includes a fixed off-time current regulator, the regulator can be in slow or mixed decay mode. The converter is the key to the easy implementation of the A4988.

There are no phase sequence tables, high-frequency control interface programming, etc. The application of the A4988 interface is very suitable for a complex microprocessor that is not available or overloaded. In the stepping operation, the chopping control in the A4988 automatically selects the current decay mode (slow or mixed). The mixed decay current control scheme can reduce the audible motor noise, increase step accuracy, and reduce power consumption.

Provide internal synchronous rectification control circuitry, to improve the pulse width modulation (PWM) power consumption during operation.

Internal circuit protection includes thermal shutdown with hysteresis, under-voltage lockout (UVLO), and crossover current protection. Don’t need special power-up sequencing. A4988 uses a surface mount QFN package (ES), the size is 5 mm × 5 mm, nominal overall package height is 0.90 mm, with an exposed thermal pad to enhance the heat dissipation function.

Features:

A4988 Driver Chip: Provides precise control of stepper motors with microstepping capabilities.

Heat Sink: Includes a heat sink to ensure efficient cooling and prevent overheating during operation.

Sticker for Identification: Comes with a sticker for easy labeling and organization of components.

Compact Design: Space-efficient design suitable for integration into tight spaces within 3D printers and other devices.

High Current Capability: Supports stepper motors with high current requirements for reliable performance.

Applications:

3D Printers: Ideal for upgrading or replacing stepper motor drivers in 3D printers for better motor control and reliability.

CNC Machines: Suitable for use in CNC machines to manage stepper motors with improved cooling.

Robotic Projects: Enhances performance in various robotic systems requiring precise stepper motor control.

Technical Details

• Operating Voltage (VDC): 8 ~ 35
• Current (No Hestsink): 1 A
• Current (With Hestsink): 2 A
• Logic Input (V) : 3 ~ 5.5
• Characters: 16
• Character Color: White
• Backlight: Blue

Integration with Arduino

Sample Code

Additional Details

• Automatic current decay mode detection/choice.
• Mixed with slow current decay mode.
• The low power dissipation of synchronous rectifier.
• Internal UVLO(ultra voltage lockout).
• Crossover current protection.
• Thermal shutdown circuit.
• Ground fault protection.
• Loading and short circuit protection.
• The optional five-step mode: full, 1/2, 1/4, 1/8 and 1/16.

Product Video

Documentation

• Datasheet

Package Includes

• 1 x Reprap A4988 stepper motor driver 3D Printer + heat sink with sticker